Sound-distributing horn.



W. S. COBB. SOUND DISTRIBUTING HORN.- APPLICATION rum APR. 12, 1910.

Patented Mar.14,1911.

MM/Woo SF. Hwy. QQZM a v! WILLIAM S. COBB. OF FLUSHING, NEW YORK.

SOUND-1)ISTRIBUIING HORN.

. Specification of Letters Patent.

Patented Mar. 14, 1911.

Application filed April 12. 1910. Serial No. 555.l)27.

To (1/! whom it may concern:

Be it known that l. 'nman b. Conn. a citizen of the United States. residing at Flushing. in the county of (Queens and State of New York. have invented new and usetul lmprovementsin Souml-Distributing Horns. of which the following is a raiccitieatiou.

The. invention relates to an improvcmentin. sound regulators. being more particularly directed to the construction of a sound intensitying horn whereby such sound is rendered more distinctive and the tone thereof materially improved.

The main object of the present invention is the provision oi a sound regulator formed to provide a plurality of interior sound pas-- sages through which the sound waves are an ranged to travel in succession. the construction and control of such passages providing for the rapid and uniform expansion of the sound volume in traveling from one passage to the next whereby to intensity and improve the tone of such sound.

The invention in its pretcrred details of construction will be described in the following specification, reference being had particularly to the accompanying drawings, in which Figure l. is a view in elevation, partly in section, of the improved horn. Fig. 2 is a similar view broken away, SllOWlllg a sli h t] y difi'erent const ruction.

ficferring particularly to Fig. '1 of the accompanying drawing, the improved horn may be said to comprise a tube or body section 1 and a mouth section 2. which sections are removably connected at 3 in any a ppropriate or preferred manner, whereby they may be assembled in horn-formiup relation or disconnected for close packing in storage or transportation. Arranged within the mouth section and communicatingwith the sound inlet: opening 4 thercthrough is an inher sound tube 5, which tube ext-ends within the mouth section of the horn an appropriate distance, is of gradually increased diameter from the inlet to-the outlet end and. is open at the inner end. Secured within the mouth section 2 and encircling the tube 5 is What I term an outer tube 6. This tube is preferably of uniform diameter through-- out its length and-secured so that it is dis osed in spacedrelation throughout its vcngt-h with the inner tube 5, whereby the chamber 7 is arranged between the tubes.

By reason of the gradually increasing diauri eter of the tube 5 from the inlet to the outlet, and the uniform diameter of the tube it will be noted that the chamber T gradually increases in area from the end thereof adjacent the free ends of the tubes 5 and G toward the. end adjacent the connected ends of said tubes 5 and (3. In other words. the space within the tube 5 gradually increases towardthe outlet end of said tube while the space within the chamber 7 gradually increases in area in the opposite direction.

The tube (3 is preferably closed at the forward or free end, as at 8, and formed adja cent the opposite end with a series of openings 9. These openings may be of any con tour or size being preferably, however, arranged in a concentric row.

the openings 9 serve to establish communication between the chamber 7 and the .horn proper, or that space surrounding the tube 6 within the mouth section of the horn. To provide for regulating these openings and thereby governing the volume of sound passing therethroL-igh, I arrange what I term a valve it) including an annular strip slidably mounted on the outer surface of the tube 6 and operated through the medium of a linger lever '1'] projecting from an opening 12 formed in the mouth section. proper manipulation of the finger lever .,the slide valve lO'may be arranged to Vang the. size of the openings 9 in accordance with the volume of sound desired, as will be clearly obvious from the drawings. 90

in Fig. .2, the construction is identical with that justdescribed except. that the tube (5 is provided With a removable cap 13, which cap, in addition to its removability and by reason of an extended edge flange 14, is capable of adjustment longitudinally on the tube 6 so as to dispose the transverse wall of the cap at varying distances with respect to the free end of the tube 5, whereby the caamber, immediately in advance of said tube. may be varied in size to control the volume of sound passing from the tube 5 to the chamber 7. In this form of the device, I have also shown a mouthpiece 15 connccted with the structure though it is to be understood that such forms no material part of the invention and may be omitted or used as desired.

. In the use of the im iirovement several ad vantageous results follow. For example, a

distinctly improved tone is imparted to the sound issuing from the horn as compared of sound.

the usual horn structure by reason of increase in volume at this point, as desired.

spreading waves at the end of the inner tube and again at the end of the outer tube. In thisvresult the adjustabilit of the cap 13 to vary the size of the chain r at the end of the inner tube provides for regulating the ain, the inner tube diver toward its I a ual s readinf ofithesound waves, whic gradua s rea is also maintained in the chain r 7 rovides a further her 7 to the horn. roper ating the volume means for manua ly re It is of course to be understood that while the improved horn is designed rimarily for use with re oducing mac ines, as' gramophones and t 6 like, it is to be understood that its use is contemplated with any 4 and all devices in which sound volume is to be increased, such as megaphones, horns of any. type and the like.

Having thus described the invention, what I claim as new, isz

1. horn, an inner tube arranged therein, an outer tube encirclin the inner. tube and communicating therewith, means for vary v a 2. A horn, an inner tube arranged therein, an outer tube encircling the inner tube and communicating therewith, and means for varying the space at the oin't of communication, said outer tube ing formed with openings establishing communication between the same and the horn proper and manually operable means for varying the size of the openings.

3. A horn, an inner tube arranged therein, an outer tube encircling the inner tube and communicating therewith, means for varying the space at the point of communication, said outer tube being formed with openings to establish communication between said tube and the horn proper, and a'manually o rable valve for simulta- 50 neously contro 'ng the size of said opening.

In testimon whereof I aflix my signature in presence 0 two witnesses.

WILLIAM S. COBB.

Witnesses:

Lnsrna S. Paauen'rm, JOHN J. KLEIN. 

